The Wicking Kinetics of Liquid Droplets into Yarns
The Wicking Kinetics of Liquid Droplets into Yarns
复制标题
液滴进入纱线的芯吸动力学
DOI：
10.1177/004051750107101003
复制
发表时间：
2001
影响因子：
2.3
通讯作者：
A. Neimark
中科院分区：
文献类型：
--
作者：
Xuemin Chen;K. Kornev;Y. Kamath;A. Neimark
使用计算机成像系统研究液滴进入纱线的芯吸动力学。提出了一种通过监测液滴吸收来表征纱线结构的新方法。该方法基于对不同纱线的液滴消失所需时间与液滴体积的函数关系的比较分析。开发了一个数学模型来描述芯吸动力学。我们表明，对于润湿液体，液滴吸收时间 T w 是初始液滴体积平方 V 0 2 的线性函数。对于给定的液体-纱线对，这种关系的斜率提供了有关纱线特性的重要信息。 T w 和V0 2 之间的线性关系通过典型纺丝油剂的实验数据得到验证。该模型预测，即使前进接触角 θa 略大于 90°，也会发生液滴芯吸。然而，对于非润湿液体，T w 和V 0 2 之间的关系是非线性的，并且获得了液滴芯吸到非润湿纱线中的标准。
The wicking kinetics of liquid droplets into yarns is studied using a computerized imaging system. A new method is suggested for characterizing the yarn structure by monitoring droplet absorption. The method is based on the comparative analysis of the time needed for droplet disappearance as a function of droplet volume for various yarns. A mathematical model is developed to describe the wicking kinetics. We show that for wetting liquids, the time of droplet absorption T w is a linear function of the initial droplet volume squared V 0 2. For a given liquid-yarn pair, the slope of this relationship provides important information about the yarn properties. The linear relationship between T w and V0 2 is verified by experimental data for a typical spin finish. The model predicts that droplet wicking can occur even if the advancing contact angle θa is slightly greater than 90°. However, for nonwetting liquids, the relationship between T w and V 0 2 is nonlinear, and a criterion for droplet wicking into nonwetted yarns is obtained.